The Ironhead Sportster runs on a battery ignition system. This system functions in a manner siilar to that of a conventional automobile. The Ironhead Sportster came equipd with a coil that fired into both cylinders at the same time. It's just that Harley Davidson didn't use the same coil every year. As time passed the coil changed. They all didn't look exactly alike. This is the older type ignition coil looked. Here are some mechanical instructions that can be used on one.

When an Ironhead Sportster rider wants to make some repair on his own it sure helps to have a part figure that shows how te part that is getting worked on is put together. This figure shows all the parts the 1959 to 1970 Ironhead Sportster circuit breaker is made of. It also includes a numbered partname list that helps one go and by some replacement parts. This figure even allows one to see how the circuit breaker gets put back together after it had been taken apart for some repair.

This is a figure of an Ironhead Sportster 1971 to 1979 circuit breaker. It shows all the parts used and includes a numbered part name list that makes it a lot easier to work on this ignition as needed. This figure even helps an Ironhead Sportster rider when the advance assembly has to get lubricated with some WD-40. Here is some Ironhead Sportster owner circuit breaker help.